<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
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    <title>css灯笼</title>
    <link rel="stylesheet" href="./index.css">
</head>
<body>
      <div class="box">
        <div class="top"></div>
        <div class="content">
            <span style="--i:0">福</span>
            <span style="--i:1">福</span>
            <span style="--i:2">福</span>
            <span style="--i:3">福</span>

        </div>
      </div>
</body>
</html>